http://www.tpc.int/faxbyemail.html

I found that, but it is rather complicated.. but it appears 100% free. You just need a client software for remote printing..

http://www.tpc.int/clients/index.html

but I mean after you get it setup and learn how to do it, it should work flawlessly for you, I think. If you fax a lot this could save you quite a bit of money over the long run.